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United States Patent | 6,018,845 |
Sueki ,   et al. | February 1, 2000 |
In order to adjust a degree of tight contact between a floor surface and a suction member of a vacuum cleaner, and to facilitate operation of the vacuum cleaner, an air flow adjusting valve is provided at a left end of an upper plate of the suction member. When a negative pressure in an inner chamber reaches to a certain valve, the air flow adjusting valve is opened and air is introduced through an air inlet. This facilitates movement of the suction member over the floor surface.
Inventors: | Sueki; Kenzo (Tondabayashi, JP); Nishinaka; Noboru (Wakayama, JP) |
Assignee: | Sharp Kabushiki Kaisha (Osaka, JP) |
Appl. No.: | 057565 |
Filed: | April 9, 1998 |
Aug 29, 1997[JP] | 9-234074 |
Current U.S. Class: | 15/375; 15/182; 15/383; 15/421 |
Intern'l Class: | A47L 005/00 |
Field of Search: | 15/375,421,385,383,363,366,23,24,27,179,182,183 |
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